So i think the person she's most likely to have a connection with is Ash, since he's the groundskeeper (Ash: does that mean I'm the outside janitor?). He's been there a few months and he's wonderfully kind and curious, though he's been super sad lately. He's definitely run into her a kajillion times thanks to their jobs, and since he's been trying to learn/remember everything and it's all new, he might try to make an effort to remind himself that he met a disappearing person.
Other than that, I could offer Dean, who as Jes' assistant would have the records and have to go "who the hell is this paycheck for?" every month.